FIELD: engines and pumps.
SUBSTANCE: cylinder block 1 has bore 2 made up of inner wall with first section 2a located nearby combustion chamber and second section to piston to reciprocate therein. Note here that said bore has metal coat 3 applied by gas-thermal evaporation onto bore inner wall by spraying fused metal drops. Said coat 3 comprises first part 3a with first concentration of iron oxide applied on cylinder bore inner wall first section and coat second part 3B with second concentration of ion oxide applied on cylinder bore inner wall second section. Note here that said second concentration exceeds said first concentration.
EFFECT: improved performances.
8 cl, 7 dwg
